Use oa for OrgAssets vars consistently

[rowanseymour]

No description provided.

[codecov]

Codecov Report

Merging #316 into master will decrease coverage by 0.01%.
The diff coverage is 91.75%.

@@            Coverage Diff             @@
##           master     #316      +/-   ##
==========================================
- Coverage   53.22%   53.21%   -0.02%     
==========================================
  Files         100      100              
  Lines        8627     8624       -3     
==========================================
- Hits         4592     4589       -3     
  Misses       3344     3344              
  Partials      691      691              

Impacted Files	Coverage Δ
hooks/ivr_created.go	5.88% <0.00%> (ø)
hooks/msg_received.go	40.00% <50.00%> (ø)
tasks/handler/worker.go	51.97% <70.83%> (ø)
tasks/starts/worker.go	57.73% <75.00%> (ø)
hooks/resthook_called.go	83.33% <80.00%> (ø)
web/simulation/simulation.go	58.49% <88.88%> (ø)
web/ivr/ivr.go	50.58% <94.11%> (-0.58%)	⬇️
hooks/airtime_transferred.go	92.98% <100.00%> (ø)
hooks/broadcast_created.go	75.86% <100.00%> (ø)
hooks/campaigns.go	80.59% <100.00%> (ø)
... and 24 more

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